EEG BOARD EXAM PREPARATION -
ADVANCED LEVEL QUESTIONS AND
ANSWERS 100% VERIFIED. JUST
RELEASED
1. Which of the following electrode materials provides the most stable recording for low-
frequency signals and DC shifts?
A. Stainless Steel
B. Silver-Silver Chloride (Ag-AgCl)
C. Gold plated
D. Platinum
Answer: B
Conceptual Explanation: Silver-Silver Chloride (Ag-AgCl) electrodes have the lowest
offset potential and provide superior stability for recording low-frequency activities
compared to other metals.
2. According to the 10-20 system, what is the distance from Fp1 to Fp2 if the total
circumference is 60 cm?
A. 3 cm
B. 12 cm
,C. 6 cm
D. 10 cm
Answer: C
Conceptual Explanation: In the 10-20 system, the distance between Fp1 and Fp2
represents 10% of the total circumference. 10% of 60 cm is 6 cm.
3. A differential amplifier’s ability to reject signals common to both inputs is defined as:
A. Input Impedance
B. Common Mode Rejection Ratio (CMRR)
C. Sensitivity
D. Gain
Answer: B
Conceptual Explanation: CMRR measures the amplifier’s effectiveness in canceling out
unwanted signals (like 60Hz noise) that appear equally at both Grid 1 and Grid 2.
4. To avoid aliasing in a digital EEG system, the sampling rate must be at least how many
times the highest frequency of interest?
A. 1 time
B. 2 times
C. 3 times
, D. 4 times
Answer: B
Conceptual Explanation: The Nyquist Theorem states that the sampling rate must be at
least twice the highest frequency component of the signal to prevent aliasing.
5. If the Low Frequency Filter (LFF) is changed from 1 Hz to 5 Hz, what will happen to the
morphology of a slow wave?
A. It will increase in amplitude
B. There will be no change
C. It will show a phase lag and appear larger
D. It will show a phase lead and appear smaller
Answer: D
Conceptual Explanation: Increasing the LFF (e.g., to 5 Hz) attenuates slow frequencies
and causes a phase lead (shift to the left) in the waveform.
6. Which EEG pattern is most characteristic of Creutzfeldt-Jakob Disease (CJD)?
A. 3 Hz Spike and Wave
B. Triphasic waves
C. Hypsarrhythmia
D. Periodic sharp wave complexes (PSWC)
ADVANCED LEVEL QUESTIONS AND
ANSWERS 100% VERIFIED. JUST
RELEASED
1. Which of the following electrode materials provides the most stable recording for low-
frequency signals and DC shifts?
A. Stainless Steel
B. Silver-Silver Chloride (Ag-AgCl)
C. Gold plated
D. Platinum
Answer: B
Conceptual Explanation: Silver-Silver Chloride (Ag-AgCl) electrodes have the lowest
offset potential and provide superior stability for recording low-frequency activities
compared to other metals.
2. According to the 10-20 system, what is the distance from Fp1 to Fp2 if the total
circumference is 60 cm?
A. 3 cm
B. 12 cm
,C. 6 cm
D. 10 cm
Answer: C
Conceptual Explanation: In the 10-20 system, the distance between Fp1 and Fp2
represents 10% of the total circumference. 10% of 60 cm is 6 cm.
3. A differential amplifier’s ability to reject signals common to both inputs is defined as:
A. Input Impedance
B. Common Mode Rejection Ratio (CMRR)
C. Sensitivity
D. Gain
Answer: B
Conceptual Explanation: CMRR measures the amplifier’s effectiveness in canceling out
unwanted signals (like 60Hz noise) that appear equally at both Grid 1 and Grid 2.
4. To avoid aliasing in a digital EEG system, the sampling rate must be at least how many
times the highest frequency of interest?
A. 1 time
B. 2 times
C. 3 times
, D. 4 times
Answer: B
Conceptual Explanation: The Nyquist Theorem states that the sampling rate must be at
least twice the highest frequency component of the signal to prevent aliasing.
5. If the Low Frequency Filter (LFF) is changed from 1 Hz to 5 Hz, what will happen to the
morphology of a slow wave?
A. It will increase in amplitude
B. There will be no change
C. It will show a phase lag and appear larger
D. It will show a phase lead and appear smaller
Answer: D
Conceptual Explanation: Increasing the LFF (e.g., to 5 Hz) attenuates slow frequencies
and causes a phase lead (shift to the left) in the waveform.
6. Which EEG pattern is most characteristic of Creutzfeldt-Jakob Disease (CJD)?
A. 3 Hz Spike and Wave
B. Triphasic waves
C. Hypsarrhythmia
D. Periodic sharp wave complexes (PSWC)
